stdio: Drop #ifdefs in the header file

These prevent the use of IS_ENABLED() and are unnecessary. Drop them and
fix a few code-style nits nearby.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/stdio_dev.h b/include/stdio_dev.h
index cd0cd60..b61c0c6 100644
--- a/include/stdio_dev.h
+++ b/include/stdio_dev.h
@@ -57,7 +57,7 @@
 /*
  * PROTOTYPES
  */
-int	stdio_register (struct stdio_dev * dev);
+int stdio_register(struct stdio_dev *dev);
 int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp);
 
 /**
@@ -82,35 +82,19 @@
  */
 int stdio_init(void);
 
-void	stdio_print_current_devices(void);
-#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
+void stdio_print_current_devices(void);
 int stdio_deregister(const char *devname, int force);
 int stdio_deregister_dev(struct stdio_dev *dev, int force);
-#endif
-struct list_head* stdio_get_list(void);
-struct stdio_dev* stdio_get_by_name(const char* name);
-struct stdio_dev* stdio_clone(struct stdio_dev *dev);
+struct list_head *stdio_get_list(void);
+struct stdio_dev *stdio_get_by_name(const char *name);
+struct stdio_dev *stdio_clone(struct stdio_dev *dev);
 
-#ifdef CONFIG_LCD
-int	drv_lcd_init (void);
-#endif
-#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
-int	drv_video_init (void);
-#endif
-#ifdef CONFIG_KEYBOARD
-int	drv_keyboard_init (void);
-#endif
-#ifdef CONFIG_USB_TTY
-int	drv_usbtty_init (void);
-#endif
-#ifdef CONFIG_NETCONSOLE
-int	drv_nc_init (void);
-#endif
-#ifdef CONFIG_JTAG_CONSOLE
-int drv_jtag_console_init (void);
-#endif
-#ifdef CONFIG_CBMEM_CONSOLE
+int drv_lcd_init(void);
+int drv_video_init(void);
+int drv_keyboard_init(void);
+int drv_usbtty_init(void);
+int drv_nc_init(void);
+int drv_jtag_console_init(void);
 int cbmemc_init(void);
-#endif
 
 #endif